Economic and Environmental Geology (자원환경지질)
- Volume 19 Issue 1
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- Pages.35-55
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- 1986
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
Petrochemical Study on the Precambrian Granitic Rocks in the Basement Area of Hambaeg Basin
함백익지(咸白益地) 기반지역(基盤地域)에 분포(分布)하는 선(先)캠브리아 화강암질암류(花崗岩質岩類)의 암석화학적(岩石化學的) 연구(硏究)
Abstract
The area of this study is located in the Sang dong district, Youngwol Gun, Kangwon Do, where the Ogcheon fold belt comes into contact with the Ryongnam massif. The area is covered by the Precambrian metasedimentary rocks of Yulri Group in the south from the line of Ungyosan-Maebongsan-Jansan-Taebaegsan Mountains and by the Cambro-Ordovician sedimentary rocks of Choseon Supergroup in the north. The Choseon Supergroup unconformably overlies the Yulri group. Several granitic intrusives occur in the Precambrian and Cambro-Ordovician terrain. The purpose of this study is to clarify the geochronology, mineralogical composition, geochemical characteristics, petrogenesis and tectonic settings of the Precambrian granitic rocks, and to evaluate the P.T. conditions of granitic intrusions. The K/Ar ages obtained from the muscovite of Nonggeori Granite, Naedeogri granite and pegmatite intruded into the Yulri Group are Early Proterozoic (
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